Exothermic reactions are favoured in the forward direction by:
Correct answer: A. Decrease in temperature.
- A. Decrease in temperature.
- B. Increase in temperature.
- C. Adding a catalyst.
- D. Removal of reactant.
Explanation
According to Le Chatelier's principle, if a change is applied to a system at equilibrium, the system will shift to counteract the change. For an exothermic reaction (which releases heat), decreasing the temperature will shift the equilibrium to the right to produce more heat.
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About Chemical Equilibrium
Reversible reactions reach dynamic equilibrium when forward and reverse rates become equal, and Le Chatelier's principle predicts the effect of changing concentration, pressure or temperature. The chapter also covers solubility product, the common ion effect, buffer action and the conditions used in Haber's process, with equilibrium shifts distinguished from changes in the equilibrium constant.
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